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10. Cover or remove the cooling fan.
11. Deactivate the control IOs of the fan in parameters 206.20 ... 206.23.
12. Reinstall all shrouding removed earlier.
Note: Do not reinstall the DC fuses or busbars but store them elsewhere until the module
can be reinstalled.
13. In case the inverter unit has a DC switch/disconnector with a charging circuit, locate the
BSFC-xx charging controller. On the controller, disable the channel of the removed
module by using the appropriate DIP switch.
14. Switch on the power to the drive.
15. Enter the number of inverter modules present into parameter 95.13 Reduced run mode.
16. Reset all faults and start the drive.
17. If the Safe torque off (STO) function is in use, perform a validation test. See the
instructions in chapter
The maximum current is now automatically limited according to the new inverter configuration.
A mismatch between the number of detected modules (parameter 95.14) and the value set
in 95.13 will generate a fault.
Returning the module
1. Install the module in reverse order. Use the following tightening torques:
• DC busbar assembly to upper insulators (2 × M8): 9 N·m (6.6 lbf·ft)
• DC busbar assembly to lower insulators (2 × M10): 18 N·m (13.3 lbf·ft)
• Fuses to DC busbars: 50 N·m (37 lbf·ft) (Bussmann), 46 N·m (34 lbf·ft)
(Mersen/Ferraz-Shawmut)
• Module to cabinet frame (4 × M8): 22 N·m (16 lbf·ft)
• DC busbar assembly to module DC input (2 × M12): 70 N·m (52 lbf·ft)
2. Remove the plugs from the coolant pipes and reconnect the pipes to the module. See
the module replacement instructions.
3. Restore the original wiring (STO and control unit power supply whenever needed).
4. Reinstall any removed fan(s). Reconnect the control and power supply wiring of the fan.
5. Set parameter 95.13 to 0 to disable the reduced run function.
6. Activate the control IOs of the fan in parameters 206.20 ... 206.23.
7. If the Safe torque off (STO) function is in use, perform an acceptance test. See the
instructions in chapter
The Safe torque off function (page
The Safe torque off function (page
Maintenance 65
83).
83).
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